Going to have to perform surgery today

Day three since my ukulele pickups have died completely. Before, I would have just moved the cable around and hopefully got some feedback or a little buzzing to make sure it was actually working. Now it doesn’t make a sound when I plug it into any of my amps. I’m not on good terms with my sister so she can’t help me get a new uke and since I’m jobless, I can’t buy new active pickup transducers or take my uke into the shop to get it fixed. If the show does happen next week, I’m going to have to do something about it now so I’m going to take out my preamp and see what I can do and hopefully not destroy it or at least not change the sound of it if I do get it working again.

Edit: Damn. Not even sure how under the saddle pickups work.